后天期末on weekdays 还是in weekdays?in the weekends

后天期末on weekdays 还是in weekdays?in the weekends on weekdays还是at weekdays weekdays 前面用 on 还是用 in 还是用 at 是on weekdays还是on weekday? my friend jack works hard in a factory on weekdays.为什么用weekdays而不用weekday weekdays前的介词应该是什么?(on.in.at?) why do not you go out and play soccer with us?的同意句...＿（2个空只能填两个单词-_-!）go out and play soccer with us?还有一个问题...是in weekdays还是on weekdays？ 英语老师来啊on weekends on the weekend at weekends at the weekend in weekends in the weekendin weekdays in the weekday in weekday on weekdays on the weekday on weekday at weekendsat weekday at weekdays (not talk)in class .listen to the teacher they want (have)shopping on weekdays(not talk)in class .listen to the teacherthey want (have)shopping on weekdays 在周末英语怎么说是on weekends还是at weekends.在工作日是on weekdays吗? ________ they have lunch at school. A.In weekdays B On weekends In on at 时间上的不同.就是天中午下午.什么的.weekdays 用哪个. I'm a middle school student in China I'm b( ) on weekdays 求答:The supermarket is too c_____ on weekdays.括号里面填crowd还是crowded weekdays的前面究竟是用介词on还是at,急! 与in,on,at能构成短语有哪些,例如：on weekdays,on time.（七年级下水平） at weekdays和on weekdays有什么区别?该怎样用? There are more customers on weekends than on weekdays in the supermarkets.(保持原句意思)There are not ______ on weekdays _____ on weekends in the supermarket,many costomers；as,请帮我分析一下,